9606 19TH AVE SE McDONALDS Geotech Report 2018-01-02 MF Import

GEOTECHNICAL ENGINEERING STUDY McDonald's Corporation June 9, 1995 E-6893-1 Page 5 Laboratory tests indicate the majority of soil expected to be exposed in excavations has between 22 and 32 percent fines and a natural moisture content ranging from 6.4 to 18.5 percent. Due to the natural moisture content, which appears to be near the optimum, it is our opinion this soil should be suitable for use as a structural fill in its present condition. Any organic muter11al present in the soil must be removed if it is to be used as structural fill. Should the moisture content increase above the optimum moisture content and for the wetter soil, the soil will need to be 'dried back' to i:he Optimum moisture content, u:;::d in non-structural areas or removed from the site. Structural fill which is to be placed in wet weather should consist of a granular material with a maximum size of three inches and no more than 5 percent fines Passing the No, 200 sieve, based on the minus 3/44nch fraction. During dry weather, most compactible non -organic soil can be used as structural fill. It is recommended that any structural fill planned for on site use be submitted for approval prior to import. Foundations Based on the encountered subsurface soil conditions, preliminary design criteria, and assuming compliance with the preceding Site Preparation and Grading section, the proposed restaurant may be supported on dense native soil or on structural fill. Overexcavation of the existing soil may be necessary depending on actual conditions exposed in the foundation excavations. A determination regarding overexcavation must be made at the time the foundation excavations are made. Foundations may be designed for an allowable bearing capacity of three thousand (3,000) pounds per square foot (psf) when bearing on the dense native soil or structural fill. The above allowable bearing value is for dead -plus -live loads and may be increased one-third for combined dead, live, wind, and seismic forces. It is estimated that tnt�i and differential settlements for the relatively light structure will be approximately onc- half and one -quarter inch, respectively. The majority of the anticipated settlement should occur during construction as the dead loads are applied. Earth Consultants, Inc.